Seigneurie de Beauharnois

Williamstown was a large, triangular shaped region on the northeast side of the Seigniory of Beauharnois. It was bounded on the northwest by the Châteauguay and English Rivers, on the southwest by the English River and South Georgetown region, on the south by the Norton Creek and Edwardstown region and on the northeast by the Seigniories of Châteauguay and La Salle. It included the Villages of Ste-Martine and St-Urbain-Premier.

English River ConcessionConcession de la Rivière des Anglais(The concession along the southeast and east side of the English River from its mouth at the Chateauguay River to the mouth of the Norton Creek at the hamlet of Aubrey.)